Automatic kitchen ventilator



Oct. 26, 1931. I P, ANDRES 1,828,016

AUTOMATIC KITCHEN VENTILATOR Filed March 12, 1930 5 Sheets-Sheet 1 Inventor 79 A itomey Get. 20, 1931. P. ANDRES 1,828,016

AUTOMATIC KITCHEN VENTILATOR Filed March 12, 1930 3 Sheets-Sheet 2 Inventor 232 277 juaz'es A ttorney Patented Oct. 20, 1931 UNITED STATES PATENT OFFICE PETER ANDRES, OF BELDZDTG, MICHIGAN AUTQMATTC KITCHEN VENTILATOR Application filed March 12, 1930. Serial No. 435,231.

is strong, compact and durable, thoroughlyreliable for its intended purpose, very simple in its method of assembly, and comparatively inexpensive to manufacture and operate.

With the foregoing and other objects in view, the invention consists of a novel construction, combination and arrangement of parts, as will be hereinafter more specifically described and illustrated in the accompany ing drawings, wherein is disclosed an embodiment of the invention, but it is to be understood that changes, variations and 2 modifications, may be resorted to wlthout departing from the spiritof the claims hereto appended. p

In the drawings whereln like reference characters denote corresponding parts throughout the several views Figure 1 is a fragmentary vertical section through a building wall showing in side elevation parts of the present invention,

Fig. 2 is a fragmentary side elevation partly in section of the movable collar,

Fig. 3 is an elevational view of the ventilating band,

Fig. 4 is a horizontal section taken substantially on the line 4-4- of Fi 1, and

Fig. 5 is a vertical section ta en substantially on the line 55 of Fig. 2 and looking in the direction of the arrows.

Referring to the drawings in detail, 6, 7 denote the outer and inner partition wallsfrespectively, that form the wall of a building. Extending from the outer partition wall 6 to the inner partition wall 7 is an air duct 8 formed by a frame 9 that is secured at its opposite ends to the respective partition walls. 1

The frame 9 is open on each end and adjacent the outer openings are supported a series of ventilating shutters indicated generally at 10 while adjacent the rear ends of the ducts there is supported another series of ventilating shutters indicated generally at 11. A 55 series of ventilating shutters 10, 11 overlap each other to form closures at the inner and outer end of the duct 8'when in the closed position shown in Fig. 1 of the drawings, and are shown in open position in dotted lines 00 in Fig. 1 of the drawings.

Each series of ventilating shutters 10, 11

are formed in the same manner and it is believed that a description of one will clearly teach the operation of the other.

The series of ventilating shutters are disposed horizontally so that their axis of rotation is in a horizontal plane. The ventilating shutters of each series are spaced vertically in stepped relation while one above the other, so that the edges will overlap each other when in closed position as clearly shown in Fig. 1 of thedrawings, while at the same time, their axis is so arranged that considerable space is found between the shutters when they are in the open position as indicated by dotted lines in Fig. 1.

Each shutter 12 of each series consists of a flat elongated bar having pintles 13, 14 projecting from the opposite ends which are so journaled in suitable openings in the sides of the frame.

On the inner edge, each shutter 12 of each series has a staple 15. A. rigid operating bar is vertically supported in movable relation within the frame 9 and has verticall spaced staples 17 on its outer side that are oined to each staple 15 on each shutter of the series.

Thus it will be seen that the bar operating 16 is supported freely by the staple on the on inner edges of the shutters. It therefore follows that movement of the bars 16 downwardly from the position shown in Fig. 1 of the drawings, will cause the series of shutters 10, 11 to rock on their axis to open the same to the position shown by dotted lines. The lower ends of a pair of motor su' porting brackets 19, 20 are anchored to t e ottom wall of the frame 9 and supported on the upper ends of these brackets is an electric motor 21 that is disposed between the outer series of shutters 10 and the inner series of shutters 11.

Projecting forwardly from the motor 21 is a drive shaft 22, on the outer end of which is rigidly coupled operatively spokes 23, 24 that sup ort the twin fan, blades 25, 26. The fan lilades 25, 26 are spaced slightly to the rear of the outer series of ventilator shutters 10, so that the operation of the ventilator shutters will not interfere with the rotation of the fan.

On the outer face of each fan blade 25, 26, there is supported a bracket 27, 28, each of which is elongated and disposed longitudinally of the blade. On the end, each bracket is formed with upstanding apertured lugs, and slidable in the apertured lugs 29, 30, there is an operating rod 31, one for each bracket.

One end of these rods 31, projects inwardly free of the blades of the fan and to these inner ends of the rods are connected the outer ends of a pair of tables 32, 33. Mounted on the operatlng rod 31 between the upstanding lu s of each bracket, are wei hts 34 adjustable on the rods by means 0 set screws 35.

It will thus be seen that the operation of the fan will cause the weight to move outwardly by centrifugal force, thus operating the rods and moving the pair of cables 32, 33.

Splined for axial movement on the shafts 22 is a collar 36 that turns with the shaft but is free to move axially with respect thereto. The outer end of the collar 36 is formed with a flange 37 having outwardly directed rings 38, 39, thereon to which the other ends of the cables 32, 33 are connected.

Rotatably mounted in slots adjacent the center of the spoke arms 23, 24, are a pair of sheave wheels 40, 41, over which the cables are interposed. The collar 36 is mounted on the shaft 22 between the fan blades and the motor.

A split stationary sleeve 42 is mounted on the periphery of the collar 36 on suitable ball bearings 37 and moves axially with the collar. Extending laterally from the sides of the split sleeve 42 are a pair of oppositely disposed lateral arms 43, 44 each of which terminate in spaced gears 45, 46 and each pair of these gears are formed with alined, elongated slots 47.

The upper end of one vertical supporting post 48 de ends from and is secured to the top wall 0 the frame 9, while the other supporting post 49 has its outer end anchored to and pro ecting above the bottom wall of the frame 9.

The inner end of each post 48, 49 terminates flush with the axis of the drive shaft 22. The post 48, 49 are arranged at the opposite sides of the drive shaft 22. A pair of horizontally disposed levers 50, 51 are rockably connected intermediate their ends as at 52 53, to the free ends supporting posts 48,49. The mner end of the levers 50, 51, are ivotally connected on pins 53 54 that are s idably mounted in the s1ots 4 between the ears 45, 46 in the arms 43, 44.

The lever is utilized for operating the rear series of shutters 11 and to accomplish this, the arm 50 is joined at its outer end as at 55 to the upper end of a rockable arm 56 that is journaled intermediate its ends on a lug 57 that is anchored to the side wall of the frame 9.

The lower end of this arm 56 is connected to as at 58, one end of a cable 59 that is trained through a sheave wheel 60 on the bottom wall and this cable 59 is anchored to a staple 61, which is secured to the operating bar 16 intermediate the ends thereof.

The outer end of the other lever 51, is connected to the inner end 62 of a cable 63, that is trained over a sheave wheel 64 on the side wall of the frame 9 and the other end of this cable is anchored to a staple 65 on the rear face of the operating bar 16 for the forward series of shutters 10.

Coil springs 66, 67 for the respective series of shutters '10, 11 have their upper ends anchored to the top wall of the frames 9, while the lower ends of each are anchored to the operating bars 16 for the purpose of closing the shutters when the motor stops operating.

From the foregoing it will be seen that when the fan blades 25, 26, are in operation, the operating rods 31, 32 will move outwardly, which action causes the cables 32, 33 to move the arms 43, 44 forwardly. This movement causes lever '50 to rock, which transmits the rocking motion to the rear series of shutters 11, and opens the shutters against the tension of the coil spring 67.

The same movement of arm 44, causes lever 51 to rock forwardly, thereby causing cable 53 to open the series of shutters 10 at the outer end of the duct 8.

A wafer type thermostat 70 is supported in the room to be ventilated, preferably near the ceiling. A switch arm 71 is pivotally connected at its upper end to a rod 72, that is supported on the side wall of the room. The thermostat is pivotally connected as at 73 to the intermediate portion of the switch arm so as to rock the arm back and forth responsive to the change in temperature in the room.

On the free end of the switch arms 73 are spaced, electrically insulated contact fingers 74, 75. Intermediate the ends, there are four, alined, spaced terminals a, b, c, and d, mounted in insulated relation to each other, and to the bracket 76 that supports them.

The free outer ends of each terminal are resilient to permit them to be bent under the influence of the contacts 74, 75. The yoke of the contact fingers straddles the ends of the terminals, so that the finger causes the terminals 0 and 01 to close, while finger 74 causes a and b to close.

The electric conductor supply lines 77, 78 are respectively connected to terminals a and b and electric conductors 79, 80 lead from terminals 0, to a switch 81 and then to motor terminals 86, 87. A frypan line formed of electric conducting Wires 82, 83 leads from supply lines 77, 78 respectively, to a set of terminals 84, 85 with which the switch 81 may be brought into contact.

A switch 88 is incorporated in the by-pass lines 82, 83 for opening the circuits while the thermostat 7 O is in operation.

Under normal conditions of operation, the switch 81 is free of contact with terminals 84, 85, while the thermostat is in operation. In event it is desired to cut the thermostat out of operation, switch 88 is closed and the switch 81 is brought into contact with terminals 84, 85.

From the foregoing, it will be seen that the thermostat at the proper predetermined temperature, will move the fingers 74, to the left at the desired temperature. This movement will cause the terminals 0 and b, to engage and at the same time will cause terminals 0 and d to engage, thereby setting up a circuit through conductors 79, 80, switch 81 which is free of contact with terminals 84,

85, and to the terminals 86, 87 that operate the motor.

The present embodiment of the invention has been disclosed in considerable detail merely for the purpose of exemplification since in actual practice, it attains the features of advantage enumerated as desirable in the statementof the invention and the above description.-

It is to be understood that by describing in detail herein any particular form, structure, or arrangement, it is not intended to limit the invention beyond the terms of the several claims or the requirements of the prior art.

Having thus described my invention, what I claim as new is 1. A ventilating apparatus including a ventilating duct in which is mounted a power driven ventilating fan comprising a frame in the duct, a series of shutters mounted in the duct to form a closure therefor, means on the fan blades for opening the shutters when the motor is running, and means connected with the frame and shutters for closing the shutters when the motor is not running.

2. A ventilating apparatus including a ventilating duct in which is mounted a power driven ventilating fan comprising a frame in the duct, a series of shutters mounted in the duct to form a closure therefor, means on the fan blades for opening theshutters when the motor is running, means connected with the frame and shutters'for closing the shutters when the motor is not running, an electric circuit for the motor, and means in the circuit responsive to temperature for controlling the operation of the motor.

3. A ventilating apparatus including a ventilating duct in which is mounted a power driven ventilating fan comprising a frame in the duct, a series of shutters mounted in the duct to form a closure therefor, means on the fan blades for opening the shutters when the motor is running, means connected with the frame and'shutters for closing the shutters when the motor is not running, said first mentioned means including a weighted arm mounted on the fan blades, a drive shaft for the fan, a sliding collar splined on the shaft and connected to said arm and means connecting the collar and blades to move the same.

In testimony whereof I affix my signature.

PETER ANDRES. 

